When uber-conservative Steve Bannon was banished from the White House as President Donald Trump’s chief adviser, he made no bones about how he was now gunning for the entire Republican Party.

To him, it was an extremely dysfunctional anti-Trump collective, populated by dinosaurs, that was in dire need of a good culling.

The other day, Bannon was in the headlines again after reportedly telling Vanity Fair that he believed Trump had an only 30% chance of serving a full term in the Oval Office.

He wasn’t talking about Trump being whacked by some crazed gunman in a gun-crazed America, or about him being impeached in a fashion reminiscent of presidents Richard Nixon and Bill Clinton.

The former was a crook, and the latter a horn-dog.

No, Bannon was talking about the obscure 25th Amendment, invoked after the assassination of John F. Kennedy, that would allow Trump’s own cabinet to vote him out of office under specific situations if the president’s health — physical or mental — impairs his ability to perform his duties.

In other words, in Bannon is correct, there is a modern-day Julius Caesar play in the works where Trump’s inner circle is plotting to take him out, and put Vice President Mike Pence in the big chair.

It takes no genius to assume that it will be Trump’s mental health that would be brought into play if Bannon’s prophecy has any validity since the president’s physical health appears to be fine.

It’s his unpredictable brain patterns that are worrisome, with both Democrats and Republicans alike voicing opinions that come close to saying outright that there is a lunatic in the White House.

Without question, Trump makes outrageous statements, lies without second thought, tweets both venom and threats, and often comes across as if playing Crazy 8s with a euchre deck.

It doesn’t help that Vanity Fair reported that sources in the White House have Trump “unstable … losing a step … unravelling,” and proclaiming he “hates everyone in the White House.”

Bannon, of course, is no fan of Mike Pence. When Pence was named as Trump’s vice-presidential running mate, emails from Bannon obtained by BuzzFeed, had him calling Pence an “unfortunate necessity” and the “price we pay for the #nevertrump movement.”

Now out of the White House and back with Breitbart, Bannon is ramping up efforts to field a slate of primary contenders to replace incumbent Republican senators in 2018 with a more pro-Trump crowd, particularly Senate majority leader Mitch McConnell who is seen as both the enemy and the money man in the GOP.

And he wants to see the 25th Amendment scenario doused.

Since late September, when the Bannon-backed former judge Roy Moore ousted Sen. Luther Strange in an Alabama Republican primary, Bannon has been hunkered down with big GOP donors and potential candidates to plot against Republicans responsible for Trump’s failure to repeal and replace Obamacare.

Bannon’s victory in Alabama invigorated his determination.

Moore, to most pundits, didn’t have a hope in hell of winning. In fact, he was twice tossed out as the state’s chief justice.

The first was for his refusal to remove a Ten Commandments monument, and the second was for refusing to recognize the U.S. Supreme Court’s ruling legalizing same-sex marriage.

Yet he still beat out Luther Strange, who rode into the election bolstered with $10 million in advertising from the McConnell-aligned Senate Leadership Fund.

On Thursday, Washington Post political columnist Robert Kagan penned a syndicated piece that carried the headline, “Steve Bannon is killing the Republican Party.

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